Respiratory mask cushion



FIG. 1 is a front perspective view showing a respiratory mask cushion according to a first embodiment of our new design;

FIG. 2 is a reverse perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a right side view thereof;

FIG. 9 is a front perspective view showing a respiratory mask cushion according to a second embodiment of our new design;

FIG. 10 is a reverse perspective view thereof;

FIG. 11 is a front view thereof;

FIG. 12 is a rear view thereof;

FIG. 13 is a top view thereof;

FIG. 14 is a bottom view thereof;

FIG. 15 is a left side view thereof; and,

FIG. 16 is a right side view thereof.

The broken lines in the drawings illustrate portions of the respiratory mask cushion that form no part of the claimed design. 

CLAIM The ornamental design for a respiratory mask cushion, as shown and described. 